doesn't work

I have bought a new Yi mirror dashcam, but it doesn't work. I can connect to this device with Yi Dashcam Android application via wi-fi but I cannot format microSD card and this message appears on the touchscreen: "To optimize the performance of the memory card. It is recommended that format the...

Hey to all, I have a sj5000 plus and a problem after the newest update, it's not possible to switch the camera on. I already tried it without battery, without sd card, connected to the charger and so on. The only thing is that the red charging lamp is on when the cam is connected to the charger...